Buggy code:
public final boolean continueToOriginalDestination ( ) { } public final void debug ( final String message ) { } final void internalOnRemove ( ) { } public final void detach ( ) { } public final void detachBehaviors ( ) { } public void detachModels ( ) { } public final void error ( final Serializable message ) { } public final void fatal ( final String message ) { } public final < Z > Z findParent ( final Class < Z > c ) { } public final MarkupContainer findParentWithAssociatedMarkup ( ) { } public final Application getApplication ( ) { } public final List < IBehavior > getBehaviors ( ) { } public final String getClassRelativePath ( ) { } public IConverter getConverter ( Class < ? > type ) { } public final boolean getEscapeModelStrings ( ) { } public final FeedbackMessage getFeedbackMessage ( ) { } public String getId ( ) { } public final IModel < ? > getInnermostModel ( ) { } public Locale getLocale ( ) { } public final Localizer getLocalizer ( ) { } public final ValueMap getMarkupAttributes ( ) { } public final Object getMarkupIdImpl ( ) { } private final int nextAutoIndex ( ) { } public String getMarkupId ( boolean createIfDoesNotExist ) { } public String getMarkupId ( ) { } public final < M extends Serializable > M getMetaData ( final MetaDataKey < M > key ) { } private MetaDataEntry < ? > [ ] getMetaData ( ) { } public final IModel < ? > getDefaultModel ( ) { } public final Object getDefaultModelObject ( ) { } public final String getDefaultModelObjectAsString ( ) { } public final String getDefaultModelObjectAsString ( final Object modelObject ) { } public final boolean getOutputMarkupId ( ) { } public final boolean getOutputMarkupPlaceholderTag ( ) { } public final Page getPage ( ) { } public final String getPageRelativePath ( ) { } public final MarkupContainer getParent ( ) { } public final String getPath ( ) { } public final boolean getRenderBodyOnly ( ) { } public final Request getRequest ( ) { } public final RequestCycle getRequestCycle ( ) { } public final Response getResponse ( ) { } public Session getSession ( ) { } public long getSizeInBytes ( ) { } public final String getString ( final String key ) { } public final String getString ( final String key , final IModel < ? > model ) { } public final String getString ( final String key , final IModel < ? > model , final String defaultValue ) { } public final String getStyle ( ) { } public String getVariation ( ) { } public final boolean hasBeenRendered ( ) { } public final boolean hasErrorMessage ( ) { } public final boolean hasFeedbackMessage ( ) { } public final void info ( final String message ) { } public final boolean isActionAuthorized ( Action action ) { } public final boolean isEnableAllowed ( ) { } public boolean isEnabled ( ) { } public final boolean isRenderAllowed ( ) { } public final boolean isStateless ( ) { } public boolean isVersioned ( ) { } public boolean isVisible ( ) { } public final boolean isVisibleInHierarchy ( ) { } public final void markRendering ( boolean setRenderingFlag ) { } public final void modelChanged ( ) { } public final void modelChanging ( ) { } public final void prepareForRender ( boolean setRenderingFlag ) { } public final void prepareForRender ( ) { } public final void redirectToInterceptPage ( final Page page ) { } public final void remove ( ) { } public Component remove ( final IBehavior behavior ) { } private boolean removeBehavior ( final IBehavior behavior ) { } public final void render ( ) { RuntimeException exception = null ; try { MarkupContainer parent = getParent ( ) ; if ( ( ( parent == null ) || ( ( parent . getFlag ( Component . FLAG_RENDERING ) ) == false ) ) || ( isAuto ( ) ) ) { <START_BUG> prepareForRender ( ) ; <END_BUG> } render_ ( ) ; } catch ( final RuntimeException ex ) { exception = ex ; } finally { try { afterRender ( ) ; } catch ( RuntimeException ex2 ) { if ( exception == null ) { exception = ex2 ; } } } if ( exception != null ) { throw exception ; } } private final void render_ ( ) { } private void onException ( final RuntimeException ex ) { } protected void renderPlaceholderTag ( final ComponentTag tag , final Response response ) { } public final void renderComponent ( ) { } private boolean needToRenderTag ( final ComponentTag openTag ) { } public final void rendered ( ) { } public void renderHead ( final HtmlHeaderContainer container ) { } public void replaceWith ( Component replacement ) { } public final boolean sameInnermostModel ( final Component component ) { } public final boolean sameInnermostModel ( final IModel < ? > model ) { } public final Component setEnabled ( final boolean enabled ) { } public final Component setEscapeModelStrings ( final boolean escapeMarkup ) { } public final void setMarkupIdImpl ( Object markupId ) { } public Component setMarkupId ( String markupId ) { } public final < M > void setMetaData ( final MetaDataKey < M > key , final M object ) { } public Component setDefaultModel ( final IModel < ? > model ) { } IModel < ? > getModelImpl ( ) { } void setModelImpl ( IModel < ? > model ) { } @ SuppressWarnings ( "unchecked" ) public final Component setDefaultModelObject ( final Object object ) { } public final Component setOutputMarkupId ( final boolean output ) { } public final Component setOutputMarkupPlaceholderTag ( final boolean outputTag ) { } public final void setRedirect ( final boolean redirect ) { }

Fix:
prepareForRender ( true ) ;